class FeaturePreservation {
public:
    struct Feature {
        enum Type {
            EDGE,
            CORNER,
            SURFACE
        };
        
        Type type;
        std::vector<int> vertexIndices;
        Vector3d direction;  // 对于边特征
        Vector3d normal;     // 对于面特征
    };

    // 特征检测
    std::vector<Feature> detectFeatures(const MeshData& mesh) {
        std::vector<Feature> features;
        
        // 检测尖锐边
        detectSharpEdges(mesh, features);
        // 检测角点
        detectCorners(mesh, features);
        // 检测特征面
        detectFeatureSurfaces(mesh, features);
        
        return features;
    }

    // 特征保持优化
    bool optimizeWithFeatures(MeshData& mesh, const std::vector<Feature>& features) {
        for(auto& vertex : mesh.vertices) {
            if(isFeatureVertex(vertex, features)) {
                // 对特征点使用特殊的优化策略
                optimizeFeatureVertex(vertex, features);
            } else {
                // 使用常规优化
                optimizeRegularVertex(vertex);
            }
        }
        return true;
    }
}; 